How to get your kids to $300K invested by age 30
And how that can become $4.6 million tax-free by 65 with no contributions after 30
The goal isn't $300K. It's a 30-year-old who never has to catch up.
Most people spend their 30s and 40s trying to make up for the investing they didn't do in their teens and 20s. This plan flips that. The dollars invested at 15 have fifty years to compound before age 65. They are, dollar for dollar, the most valuable contributions this child will ever make.
The Roth wrapper is what makes the math remarkable. Contributions go in after tax, when the child's tax rate is at or near zero, and every dollar of growth from there is tax-free, forever. A teenager's summer-job income will never be taxed more lightly than it is right now, which makes these the cheapest Roth dollars a family will ever buy.
Just as important: the child learns the pattern early. Earn, invest, repeat. By 30 it isn't a strategy anymore. It's simply how they handle money. And if they never add another dollar, the account can still carry them toward a multi-million-dollar, tax-free retirement.
The full journey: fifteen years of contributing, thirty-five years of compounding. Hypothetical illustration assuming an 8% average annual return; returns are not guaranteed.
"You can't give your kids fifty years of compounding when they're 40. You can when they're 15."
The plan in three numbers
Hypothetical illustration assuming 8% annual returns. For illustrative purposes only.
Six moves. Fifteen years. $313K.
The plan asks for modest, believable amounts: summer jobs, part-time work, then a coordinated family effort once the child starts a career. Each contribution goes into Roth accounts, where it grows tax-free for life.
- 1 Age 15: open the account with the first $2,000. The child earns $2,000 from a summer or part-time job, and mom and dad open a custodial Roth IRA (a Minor Roth) and contribute the full $2,000. Earned income is the key that unlocks the account.
- 2 Ages 16–17: repeat at $3,000 per year. The child earns $3,000 each year and the same amount goes into the custodial Roth. The habit is now established: you earn, you invest.
- 3 Ages 18–19: step up to $4,000 per year. Earnings grow with age, and so do contributions. By 19, the account has already crossed $18,000.
- 4 Ages 20–21: step up to $5,000 per year. Through the college years, the process repeats at $5,000. Heading into graduation, the account is worth roughly $32,000, before a real career has even started.
- 5 Age 22: graduate, and go to $20,000 per year. The child starts a career, and the family works together to invest a combined $20,000 that year across Roth IRA and Roth 401(k) contributions.
- 6 Ages 23–30: hold the line at $20,000 per year. The same $20,000 goes in every year through age 30. Any employer matching dollars land on top, in excess of the $313K.
| Age | Contribution | Growth (8%) | Balance | |
|---|---|---|---|---|
| 15 | $2,000 | N/A | $2,000 | Custodial Roth opens |
| 16 | $3,000 | +$160 | $5,160 | |
| 17 | $3,000 | +$413 | $8,573 | |
| 18 | $4,000 | +$686 | $13,259 | |
| 19 | $4,000 | +$1,061 | $18,319 | |
| 20 | $5,000 | +$1,466 | $24,785 | |
| 21 | $5,000 | +$1,983 | $31,768 | |
| 22 | $20,000 | +$2,541 | $54,309 | Career starts · Roth IRA + 401(k) |
| 23 | $20,000 | +$4,345 | $78,654 | |
| 24 | $20,000 | +$6,292 | $104,946 | |
| 25 | $20,000 | +$8,396 | $133,342 | |
| 26 | $20,000 | +$10,667 | $164,009 | |
| 27 | $20,000 | +$13,121 | $197,130 | |
| 28 | $20,000 | +$15,770 | $232,900 | |
| 29 | $20,000 | +$18,632 | $271,532 | |
| 30 | $20,000 | +$21,723 | $313,255 | Goal reached |
| Total | $206,000 | +$107,255 | $313,255 |
Employer matching contributions are not included and would be in excess of the $313K. Market returns are not guaranteed; figures are for illustrative purposes only.
Assumes 8% annual returns. Contribution phases shown along the bottom.
The cost of waiting
Every scenario below contributes the identical $206,000 on the identical fifteen-year schedule. The only difference is the age the first $2,000 goes in. Waiting five years could cost about $1.5 million at 65. Waiting ten could cost $2.5 million. The money is the same; the years are not replaceable.
Projected value at age 65 assuming 8% annual returns and no contributions after the fifteen-year plan ends. Hypothetical illustration.
The $300K-by-30 plan, in under a minute
A quick walkthrough of the strategy: how the contributions ladder up, why the Roth wrapper matters, and what the account looks like at 65.
What could your child's first $2,000 turn into?
We can help you set up the custodial Roth, map the contribution schedule to your child's actual earnings, and model what the account could look like at 30 and at 65.
Schedule a conversation Download the one-page plan (PDF)